Question about 2002 GMC Envoy
The first time it did that, I replaced the spark plugs and still the same. Next thing I did is I replaced the the fuel filter and still the same.
2.leaking egr or plugged pcv valve
3.ignition components damp or damaged
4.faulty or incorrectly gapped spark plugs
5.faulty plug wires
6.faulty emmission components
7.air filtr clogged
8.leaking head gasket
9.timing chain or gears worn
first check air filter then check timing with a light make sure its steady if it bounces around the your chain/belt is needing replaced check your wires for frays or just replace them cause their 10 years old
Posted on Feb 10, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
Aug 27, 2012 | Honda Civic Cars & Trucks
For idle issue,click the help links provided below :---
Bad miss at idle? http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html---------- Engine stumbles coming off idle when warm?
While stop engine idles like cylinder missing?
Idle flair is noticed on car? Rough idle? car will not idle? Erratic idle speed?
High rpm in neutral? Inconsistant high RPM in neutral? http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html
Erratic idle on car?
Low idle when cold out side?
Idle Air Control (IAC) Valve Replacing?
intermittent engine failure while idle?
Engine quits at idle?
Car overheats and Air blows hot at idle? http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html
not starting or turning over indicates towards multiple possibilities. It can
be issue with battery or weak battery. But if battery checks out ok, then it
can be starter issue or faulty alternator or problem with low fuel pressure or
no spark at spark plugs due to dirty spark plugs or faulty ignition
coil or injectors getting cracked or dirty and needs to be cleaned.
confirm the problem, the basic troubleshooting is required.
this link below and follow the troubleshooting:------
This will help.
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